obama called the right to vote the nation's most important civil rights issue. >> this is the sit in of our day, sitting in the phone bank, calling everyone you know, calling your friend and neighbors and the nephew you haven't seen in a while. >> that was peter alexander reporting. in our fact or fiction segment, we look at a claim and ad by president obama about abortion. the ad claims that mitt romney and paul ryan are both "opposed to abortion even in cases of rain and incest." while that is true of ryan's positionment position. it is not necessarily true of romney. he says he allows for exceptions of rain and incest and if the mother's life is at risk. the obama campaign says romney supported the republican party platform that would ban abortion without exception is their claim is valid. >>> we have new information on the search for the cause of the deadly hasn't virus outbreak at yosemite. scientists looking in to the matter say a spike in the deer mouse population combined with the design of the cabins would be to blame. they were built in a way that mice could easily nest in